# app/services/export_service.py (базовая версия)
from sqlalchemy.orm import Session
import csv
import io


class ExportService:
    def __init__(self, db: Session):
        self.db = db

    def export_form_data(self, form_id: int, format: str = "csv"):
        # Временная заглушка
        output = io.StringIO()
        writer = csv.writer(output)
        writer.writerow(["id", "form_id", "submitted_at", "data"])
        writer.writerow(["1", str(form_id), "2024-01-01", "{}"])

        output.seek(0)
        return output.getvalue(), f"form_{form_id}.csv", "text/csv"